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Product Description

Size: 1 Pack

The Powerex MHR84V Rechargeable NiMH Battery (8.4V, 300mAh) is a nickel-metal hydride battery compatible with Powerex's MH-C1090F 10-Bank Charger or MH-C490F Stealth Charger. It has a voltage of 8.4V and a capacity of 300mAh. The MHR84V is free of memory effect, a condition which can cause batteries to hold less charge over time, meaning it will retain its full charge without conditioning. The battery is rechargeable up to 1000 times. The purchase of an NiMH battery like this one saves you money, since you won't need to buy endless supplies of non-rechargeable alkaline batteries.

Most Helpful Customer Reviews

I've been using rechargeable batteries in wireless mics for years. I've usually used Ansmann products, but the Tenergy 250mAh one had great reviews. Also, my go-to Ansmann 250mAh was not available. I read some negative reviews on the Ansmann 300mAh so I wanted an alternative and tried the Tenergy.

I was dismayed on Sunday when using my new Tenergy battery (fully charged of course) my mic quit before the end of the service. I had gotten about 2.5 hours of use out of it between the rehearsal and two song services. I've never had one quit on me in that short a time.

I ordered two other batteries and did a shootout. I put all the batteries in identical mics (Shure ULX Beta87's) and left the power on sitting on a desk. I believe that using the mics actively would shorten the times but be harder to compare accurately.

but this one is a winner, a lot of rechargeable 9v batteries range from 7.2v, 8.4, and 9.6, depending on how sensitive your gear is select carefully. This one works great in my kids remote controls, they constantly forget to switch them off, so that would have been very expensive in alkaline versions.

powerex and Maha are superb brands when it comes to rechargeable batteries and chargers

I purchased this for use in a portable headphone amplifier I built (AMB Labs Mini3) and since constructing it, I have not needed to open the amp, it charges well, lasts a decent amount of time and has been going strong for a year now! If you need a rechargable 9 volt, this will meet your needs and provide reliable performance for quite some time.

I bought these items because of their relatively large life and of course for their ability to be recharged. We purchased the Lenmar Pro9V2 charger for regular use and had no problems with charging these batteries with that charger. Two units were used in different applications after being charged; one unit indicated 0 (ZERO) VDC when measured with a multimeter, the second unit overheated and deformed (warping the plastic cover) and was removed from service. I understand that these units are not to be charged for an extended period of time, but both of these failures occurred AFTER they were charged and either in a unit for use or ready to be installed for use. This is a very high defect rate for the total of 8 units I had originally purchased. I will now be purchasing an Energizer battery with less life in the hopes that they will be less defect prone.

I PURCHASED THESE AND GAVE THEM TO A FRIEND FOR HIS MICROPHONES AT THE AUCTION...AND WITH THE POWEREX NAME I THINK THEY WILL DO THE JOB FOR A LONG TIME...AND THEY SHOULD KEEP HIM CALLING OUT BIDS FOR A LONG TIME NOW...